Avulsion fracture of the lesser trochanter: an unusual cause of hip pain in an adolescent.

Sports injuries involving the hip and groin are common. Special consideration must be given to musculoskeletal injuries in children and adolescents as their immature skeletons have growth plates that are relatively weaker than the tendons and ossified bone to which they connect. We present a case of an adolescent athlete with acute-onset groin pain who was found to have an avulsion fracture of the lesser trochanter.